Jefferson Township is situated on the northeast edge of Franklin County, Ohio as a part of the Columbus metropolitan area and situated between the Blacklick Creek, Big Walnut Creek and Swisher Creek watershed. The township is one of the seventeen townships of Franklin County, Ohio, United States. The 2010 census found 10,972 people in the township, 10,234 of whom lived in the unincorporated portions of the township. It was established on September 6, 1816. Geography Located in the eastern part of the county, Jefferson Township consists of a large section and many small "islands". Most of these islands are surrounded by either Gahanna or Columbus, cities that have annexed most of the western and southern parts of the township. The large section borders the following townships and cities: Plain Township – north Jersey Township, Licking County – northeast corner Pataskala – east New Albany – northwest Reynoldsburg – south Besides Gahanna and Columbus, the unincorporated community of Blacklick lies in the southern part of the township. Blacklick Creek and its associated tributaries of its watershed such as Swisher Creek flow through Jefferson Township. Big Walnut Creek is also to the west of the township while some of its tributaries such as Rocky Fork Creek travel through the western part of Jefferson Township. This has caused the topography in the township to be more varied then some of the surrounding areas from the resulting from these stream corridors, hills, ravines, and slopes much of it associated with the waterways, tributaries, and floodplain that Jefferson Township is in from Rocky Fork, Blacklick, and Swisher Creeks Climate The Köppen Climate Classification subtype for this climate is "Dfa" (Hot Summer Continental Climate). This climate type is assessed as a Humid continental climate, which is a climatic region typified by large seasonal temperature differences, with warm to hot (and sometimes humid) summers and cold (sometimes severely cold) winters. Name and history The area of the Scioto River, Olentangy River watershed, south to the Ohio River area have been inhabited by the Adena people more than 2000 years ago. Two earthworks from mound builders cultures have been found in Jefferson Township and new ones continue to be found in the area around the township to this day. The first settlement in what became Jefferson Township by settlers of European descent was established in 1802 or 1803 after beneficiaries of land grants for service in the Revolutionary